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Folding container


Title: Folding container.
Abstract: A folding container having integrally formed hinge elements. The container including a base portion, first and second lower side wall portions having a snap-fitted hinge connection to a first side and second side of the base portion respectively, first and second upper side wall portions having a hinge connection to the lower side wall portions, and a rim portion having a snap-fitted hinge connection to the first and second upper side wall portions, and end walls having a hinged connection to the rim portion. The hinge elements including hook-shaped snaps having a first ramp segment and a second ramp segment on the outer surface of the hook portion to facilitate connection of a hinge axel to the hook-shaped snaps. A tongue and groove combination in the lower and upper side wall portions to provide structural support for loads placed on the container. The folding container including locking tabs in the base portion for engaging notches in the lower side wall portions when the container is in a folded configuration. A plurality of stanchion ribs extending upward from the rim portion to supports loads on the container. A locking tab having a window for providing visible evidence the end wall is properly positioned in an unfolded configuration. A stamping tab extending downward from the rim to facilitation hot stamping of the tab when the container is assembled. ...

Browse recent Orbis Corporation patents
USPTO Applicaton #: #20110056935 - Class: $ApplicationNatlClass (USPTO) -
Inventors: Venu Samprathi



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The Patent Description & Claims data below is from USPTO Patent Application 20110056935, Folding container.

CROSS-REFERENCE TO RELATED APPLICATIONS

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This application is a continuation of U.S. patent application Ser. No. 12/114,192 filed May 2, 2008.

FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable.

TECHNICAL FIELD

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The invention generally relates to a foldable container having integrally molded hinges, and more particularly to a pin-less foldable container having components that are snap-fitted together to provide a secure structure for withstanding internal and external pressures.

BACKGROUND OF THE INVENTION

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Foldable or collapsible containers are useful in transporting and/or storing a variety of items or goods. In particular, such containers can be used to transport automotive (or other similar) parts.

Foldable containers take up less volume in a collapsed state. Accordingly, such containers can be more efficiently transported when empty. However, because the containers are collapsible, it is important that they are structurally sound during transportation, both in the unfolded, load carrying configuration, as well as in the collapsed or folded configuration.

In order to be foldable, the containers are formed to have a number of moving parts, such as side walls and end walls that collapse inwardly. To accomplish this, hinge elements are incorporated into the container. Such hinge elements have typically required one or more pins be inserted into the element to act as an axel.

In some known containers, certain of the hinge elements can be formed without a pin by creating axel nubs (e.g., partial cylindrical extensions) that extend from projections from one component of the container, that mate with a corresponding enclosure on another component. However, these are typically not as strong as having a complete axel extend through out the hinge element, and are prone to easily disengage during use.

A number of considerations are involved in designing and creating such foldable containers. These include cost of construction, number of parts, time and manpower required to assemble, time and manpower to fix or replace parts, cost of materials, strength, stability, etc.

The present invention is provided to solve the problems discussed and to provide advantages and aspects not provided by prior folding containers of this type. A full discussion of the features and advantages of the present invention is deferred to the following detailed description, which proceeds with reference to the accompanying drawings.

SUMMARY

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OF THE INVENTION

The present invention provides a foldable container that can be quickly and easily assembled. The container is constructed from components that are snap fitted together without requiring the insertion of separate pins into hinge structures on the container. The container also includes structures to provide strength and stability in both a folded and unfolded configuration.

According to one aspect of the invention, a pin-less folding container is provided. The container includes a generally rectangular base portion having a top or upper surface for supporting goods. The base portion includes a first side and an opposing second side, a first end and an opposing second end. A plurality of hook-shaped snap elements are integrally formed with and extend upward from the top surface of the base portion along the first side and a plurality of hook-shaped snap elements are integrally formed with and extend upward from the top surface of the base portion along the second side. A short ledge extends upward about a periphery of the top surface.

The foldable container also includes a generally rectangular rim portion having a first side, an opposing second side, a first end and an opposing second end collectively defining a central rectangular opening. The rim portion includes a plurality of integrally formed hook-shaped snap elements extending downward from the first side of the rim portion and a plurality of integrally formed hook-shaped snap elements extending downward from the second side of the rim portion.

The foldable container additionally includes a first side wall connected to the first side of the base portion and the first side of the rim. The first side wall includes a first lower side wall portion. The first lower side wall portion includes a plurality of integrally formed hinge axels in a bottom of the first lower side wall portion. Each hinge axel is formed as cylindrical bar extending between a first wall of a square or rectangular gap in the bottom of the lower side wall portion, and a second wall of the gap, and is positioned in one of the plurality of hook-shaped snap elements along the first side of the base portion to form a rotational hinge connection between the first lower side wall portion and the first side of the base portion. The first lower side wall portion also includes an integrally formed top hinge element (e.g., either one or more axels or hook shaped projections) on a top of the first lower side wall portion for engagement with a corresponding hinge element.

The first side wall also includes a first upper side wall portion. The first upper side wall portion has an integrally formed bottom hinge element rotationally connected to the top hinge element of the first lower side wall portion (e.g., either one or more axels or hook shaped projections to correspond to the axels or hook shaped projections of the lower side wall portion). Additionally, the first upper side wall portion includes a plurality of integrally formed hinge axels. Each hinge axel is formed as cylindrical bar extending between a first wall of a gap in the upper side wall portion and a second wall of the gap and is positioned in one of the plurality of hook-shaped elements along the first side of the rim portion.

The container also includes a second side wall having a second lower side wall portion and a second upper side wall portion similar to that of the first side wall. The second side wall is connected to the second side of the base portion and the rim portion.

The rim portion can also include a plurality of integrally formed hook-shaped snap elements extending downward from each of the first and second ends of the rim portion. A first end wall having a plurality of integrally formed hinge axels along a top of the first end wall can be rotationally connected to the first end of the rim portion. Each hinge axel is formed as cylindrical bar extending between a first wall of a gap in the first end wall and a second wall of the gap and is positioned in one of the plurality of hook-shaped elements on the first end of the rim portion. Similarly, the rim portion can include a second end wall having a plurality of integrally formed hinge axels along a top of the second end wall. Again, each hinge axel is formed as cylindrical bar extending between a first wall of a gap in the second end wall and a second wall of the gap and is positioned in one of the plurality of hook-shaped elements on the second end.

To facilitate assembly of the container and maintain the side walls in proper position, the container can further include a plurality of ribs having a curved upper surface for engaging a portion of the bottom of the lower side wall portion extending along the first side and second side of the base portion. Similarly, the container can include a plurality of ribs having a curved upper surface for engaging a portion of the top of the upper side wall portion extending along the first side and second side of the rim portion.

The hook-shaped snap elements can be uniquely configured to facilitate snapping the side wall portion or end wall into place. In this regard, each hook-shaped element can include a first flat ramp segment inclined at a first angle with respect to the vertical, and configured to guide a corresponding hinge axel (initially moving along or engaging the otherwise curved exterior surface of the hook portion of the element) to snap the hinge axel into position in the interior of the hook-shaped snap element.

Additionally, each hook-shaped snap element can include a second flat ramp segment positioned between the first flat ramp segment and an end of the hook portion. The second flat ramp segment can be inclined at a second angle greater than the first angle, and configured to further facilitate and guide a corresponding hinge axel to snap the hinge axel into position in the hook-shaped snap element.

The base portion of the container can include a first side wall locking tab extending upward from the top surface of the base portion, and a second side wall locking tab extending upward from the top surface of the base portion. The first lower side wall portion includes a notch for engaging the first locking tab when the container is in a folded configuration, and the second lower side wall portion includes a notch for engaging the second locking tab when the container is in a folded configuration. The tabs and notches prevent the side walls from moving during transportation in a folded configuration.

In accordance with another embodiment of the present invention, a container having components with integrally formed hinge elements is provided. The container includes a rectangular base having a plurality of integrally formed upwardly extending snap-hooks along a first side of the base, and a plurality of integrally formed upwardly extending snap-hooks along a second side of the base. The snap-hooks have a hook shaped portion including a first flattened ramp segment along an exterior of the hook shaped portion. The container further includes a first side wall connected to the first side of the base having a plurality of integrally formed hinge axels extending between a corresponding plurality of gaps in the bottom of the first side wall portion and, a second side wall connected to the second side of the base having a plurality of integrally formed hinge axels extending between a corresponding plurality of gaps in the bottom of the second side wall portion

The snap-hooks can further include a second flattened ramp segment along the exterior of the hook shaped portion between the first flattened ramp segment and an end of the hook shaped portion. The second flattened ramp segment is inclined inward at a second angle greater than the first angle.

Additionally, the container can include a generally rectangular rim portion having a plurality of snap-hooks extending downward along a first side and a second side of the rim portion. The snap-hooks are rotationally connected to a top of the first side wall and the second side wall.

In accordance with another aspect of the invention, a foldable container having support structure in the side walls is provided. The container comprises a base having a first side and a second side, and a rim having a first side and a second side. The container includes a first side wall having a lower side wall portion having a bottom connected to the first side of the base and an upper side wall portion having a top connected to the first side of the rim. The lower side wall portion also includes a top having a hinge connection to a bottom of the upper side wall portion. Additionally, a first blade extends upward from the top of the lower side wall portion. The first blade cooperates with a first pocket extending downward from the bottom of the upper side wall portion for receiving the blade.

The container also includes a second side wall having a lower side wall portion having a bottom connected to the second side of the base and an upper side wall portion having a top connected to the second side of the rim. The lower side wall portion also includes a top having a hinge connection to a bottom of the upper side wall portion. Similar to the first side wall, the lower portion of the second side wall includes a second blade extending upward from the top of the lower side wall portion and the upper side wall portion includes a second pocket extending downward from the bottom of the upper side wall portion for receiving the blade. Preferably, the blade and pocket in both side walls are located proximate a mid portion of the upper and the lower side wall portions.

The first blade is sized to contact a top surface of the first pocket. The first pocket includes a generally rectangular bottom surface defining an opening of the pocket and is sized so that the bottom surface rests on the top of the lower side wall portion.

In accordance with another aspect of the invention, a foldable container includes a base having a first side and a second side, and a rim having a first side and a second side. The container also includes a first side wall having a lower side wall portion having a bottom connected to the base and an upper side wall portion having a top connected to the rim. The lower side wall portion includes a top having a hinge connection to a bottom of the upper side wall portion. A first blade extends downward from the bottom of the upper side wall portion and a first pocket extends upward from the top of the lower side wall portion for receiving the blade.

In yet another aspect of the invention, a folding container comprises a base having a first side and a second side, and a rim having a first side and a second side, and a first side wall having a lower side wall portion having a bottom connected to the base and an upper side wall portion having a top connected to the rim. The lower side wall portion includes a top having a hinge connection to a bottom of the upper side wall portion. Additionally, the container includes a first L-shaped support extending downward from the bottom of the upper side wall portion and, a first open pocket proximate the top of the lower side wall portion configured to receive the first L-shaped support.

The container can also include a second L-shaped support extending downward from the bottom of the upper wall portion where the second L-shaped support is spaced apart from the first L-shaped support, and a second open pocket proximate a top of the lower side wall portion configured to receive the second L-shaped support. A blade and pocket combination can be positioned between the L-shaped pockets.

The first L-shaped support can include a generally planar first wall parallel to the upper side wall portion and a horizontal wall extending from a bottom end of the L-shaped support. The first open pocket can include a horizontal landing for contacting the horizontal wall of the first L-shaped support.

In accordance with yet another aspect of the invention, a folding container comprises a base having a first side and a second side, and a rim having a first side and a second side, and a first side wall having a lower side wall portion having a bottom connected to the base and an upper side wall portion having a top connected to the rim where the lower side wall portion including a top having a hinge connection to a bottom of the upper side wall portion. A first L-shaped support extends upward from the top of the lower side wall portion, and a first open pocket proximate the bottom of the upper side wall portion is configured to receive the first L-shaped support.

In accordance with a further aspect of the invention, a folding container having a plurality of upper support stanchions is provided. The container comprises a generally rectangular base having a first side, a second side, a first end and a second end, a first side wall having a bottom connected to the first side of the base by a hinge, and a second side wall having a bottom connected to the second side of the base by a hinge. The container also includes a generally rectangular rim having a first side, a second side, a first end and a second end collectively defining a central opening. The first side of the rim is connected to a top of the first side wall by a hinge and the second side of the rim connected to a top of the second side wall by a hinge. A plurality of stanchions, such as T-shaped (in cross-section) ribs extend upward from a generally horizontal top wall of the rim. The rim can comprise an outer wall, an inner wall, and a horizontal top surface between the outer wall and the inner wall. The stanchions could then extend upward from the horizontal top surface.

Preferably, at least one of the plurality of stanchions is positioned proximate each corner of the rim. Additionally, at least one of the plurality of stanchions is positioned approximate a mid portion of the first side and at least one of the plurality of stanchions is positioned approximate a mid portion of the second side.

In accordance with one embodiment of the container, the outer wall of the rim includes a first raised portion proximate the first corner, a second raised portion proximate the second corner, a third raised portion proximate the third corner, and a fourth raised portion proximate the fourth corner. Similarly, the outer wall includes a fifth raised portion proximate mid portion of the first side, and a sixth raised portion proximate the mid portion of the second side.

In accordance with yet another aspect of the invention, a folding container is provided having a visual mechanism for confirming the container is locked in an unfolded configuration. The folding container comprises a generally rectangular base having a first side, an opposing second side, a first end and an opposing second end. A first wall or projection extends upward along the first end of the base and a second projection extending upward along the second end of the base. The first and second projections can be part of a continuous wall or projection extending about the entire periphery of the base. The container further includes a first side wall connected to the first side of the base and a second side wall connected to the second side of the base. A generally rectangular rim is provided having a first side, an opposing second side, a first end and an opposing second end defining an opening there between. The first side of the rim is connected to the first side wall and the second side of the rim is connected to the second side wall.

The container includes a first end wall having a top end rotationally connected to the first end of the rim by a first hinge. The first end wall has a first snap element extending from a bottom end of the end wall. Similarly, a second end wall is rotationally connected to the second end of the rim by a second hinge. A first locking tab extends from the first ledge of the base for engaging the first snap element of the first end wall. The first locking tab includes an opening where the first snap element is at least partially visible when the first end wall is locked to the base in an unfolded configuration. A second locking tab can extend from the second ledge of the base for engaging a second snap element extending from a bottom of the second end wall. The second locking tab also includes an opening where the second snap element is at least partially visible when the second end wall is locked to the base in an unfolded configuration.

Preferably, the first and second snap elements include an upwardly projecting ridge. The upwardly projecting ridge is configured to fit in the window of the locking tab when the first and second walls are locked in place. The first and second snap elements also include an inclined surface for contacting an outer portion of the locking tab and forcing the snap element downward until it snaps into place in the locking tab.

To facilitate a visual inspection, the first snap element (or at least the portion viewable through the window, e.g., the upwardly projecting ridge) is a first color or design and the first locking tab is a second color or design different from the first color or design. Contrasting colors or designs will make it easy to determine whether the snap element is in place.

The locking tabs extend from the respective projections toward the interior of the container. While some containers may only use one locking tab for each end wall, additional tabs and snap elements can be employed as desired depending on the size and strength considerations at issue.

The end wall can be configured to include structure for supporting any load applied through the locking tabs. This will reduce fatigue of the snap element. The structure includes a first support that extends from the bottom of the first end wall proximate a first side of the snap element and is positioned to receive loads applied by or through the locking tab. Similarly, a second support extends from the bottom of the first end wall proximate a second side of the snap element and is also positioned to receive loads applied by the locking tab. This structure can be utilized regardless of whether more than one color is used.

In accordance with another aspect of the container a folding container configured for hot stamping after assembly is provided. The folding container comprises a base having a first side and a second side, a first side wall having a lower side wall portion connected at a bottom to the first side of the base by a hinge, and an upper side wall portion connected at a bottom to a top of the lower side wall by a hinge. The container also includes a second side wall having a lower side wall portion connected at a bottom to the second side of the base by a hinge, and an upper side wall portion connected at a bottom to a top of the lower side wall by a hinge. The folding container further includes a rim having a first side connected by a hinge to a top of the upper side wall portion of the first side and a second side connected by a hinge to a top of the upper side wall portion of the second side wall. The rim includes a first tab on the first side extending below portions of the rim on either side of the first tab so that the first tab can be captured between a rear support and a die head of a hot stamping device when the container is in a partially folding configuration.

The rim can include a second tab on the second side of the rim extending below portions of the rim on either side of the second tab so that the second tab can be captured between a rear support and a die head of a hot stamping device when the container is in a partially folding configuration. Preferably, the tab is positioned proximate a mid portion of the first side or the second side of the rim.

In accordance with yet another aspect of the invention, a method for hot stamping an assembled foldable container is provided. The method comprises the steps of first assembling a foldable container having a base, a first foldable side wall connected to a first side of the base, a second foldable side wall connected to a second side of the base, and a rim connected to a top of the first side wall and the second side wall. The rim includes a tab extending downward past a section of the rim on a first side of the tab and a section of the rim on an opposing second side of the tab. The method further comprises partially folding the assembled container to expose a back surface of the tab. Once the tab is exposed on both sides a hot stamping process can be employed. This comprises positioning a support piece of a hot stamping device against the back surface of the tab of the assembled container, positioning a film (containing indicia and/or a design to be hot stamped to the container) on a front surface of the tab of the assembled container and contacting the film with a die head of the hot stamping device.

Other features and advantages of the invention will be apparent from the following specification taken in conjunction with the following drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

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AND ATTACHMENTS

To understand the present invention, it will now be described by way of example, with reference to the accompanying drawings in which:

FIG. 1 is a perspective view of an embodiment of a container in accordance with the present invention;

FIG. 2 is a top perspective view of a base portion of the container of FIG. 1;

FIG. 3 is a bottom perspective view of the base portion of FIG. 2;

FIG. 4 is a partial top perspective view of one end of the base portion of FIG. 2;

FIG. 5 is a perspective view of the interior side of a bottom portion of a sidewall of the container of FIG. 1;

FIG. 6 is a perspective view of the exterior side of a bottom portion of a sidewall of the container of FIG. 1;

FIG. 7 is a perspective view of the exterior side of a top portion of a sidewall of the container of FIG. 1;

FIG. 8 is a perspective view of the interior side of a top portion of a sidewall of the container of FIG. 1;

FIG. 9 is a perspective view of an exterior side of an end wall of the container of FIG. 1 with two hinge elements in an open position;

FIG. 10 is a perspective view of an interior side of an end wall of the container of FIG. 1 with two hinge elements in an open position;

FIG. 11 is a perspective view of an exterior side of an end wall of the container of FIG. 1 with two hinge elements in a closed position;

FIG. 12 is a partial perspective view of an exterior side of a central bottom portion of the end wall of FIG. 9;

FIG. 13 is a perspective view of a top of a rim of the container of FIG. 1;

FIG. 14 is a perspective view of a bottom of a rim of the container of FIG. 1;

FIG. 15 is an enlarged perspective view of a portion of the rim of FIG. 13;

FIG. 16 is a cross-sectional view of a lower side wall portion and a base portion of the container illustrating a step for rotationally connecting the lower side wall portion to the base portion;

FIG. 17 is a cross-sectional view of a lower side wall portion and a base portion of the container illustrating another step for rotationally connecting the lower side wall portion to the base portion;

FIG. 18 is a cross-sectional view of a lower side wall portion and a base portion of the container illustrating folding the lower side wall portion into the base portion after rotationally connecting the lower side wall portion to the base; ; and,

FIG. 19 is a perspective view of a portion of the rim of a partially folded assembled container during a hot stamping procedure.

DETAILED DESCRIPTION

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While this invention is susceptible of embodiments in many different forms, there is shown in the drawings and will herein be described in detail preferred embodiments of the invention with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the broad aspect of the invention to the embodiments illustrated.

The design of the present invention includes features for improving assembly, manufacture, stability and strength of a foldable or collapsible container. Each of the components of the container can be formed in an injection molding process, or other well known processes.

Referring to FIG. 1, a foldable container 10 in accordance with the present invention is provided. The foldable container 10 includes a generally rectangular base portion 12. The base portion 12 supports a first sidewall 14 and a second sidewall 16, and a first end wall 18 and a second end wall 20. The sidewalls 14, 16 and end walls 18, 20 extend to a generally rectangular rim portion 22.

The base portion 12 of the container 10 (shown in FIGS. 2-3) includes a rectangular support surface 24 surrounded by a four raised walls or projections 26 along the periphery of the support surface 24. The raised projections 26 extend along first and second sides 28, 30 of the base portion 12, and along first and second ends 32, 34.

The upper surface 24 of the base portion 12 includes a plurality of hook-shaped snap elements or simply snap-hooks 36 extending upward along each side 28, 30 of the base portion 12 proximate the projections 26. The snap-hooks 36 cooperate with hinge elements in the side walls 14, 16 in a manner described in more detail below, to connect the side walls 14, 16 to the base portion 12 and allow for rotational movement of the sidewalls 14, 16 with respect to the base portion 12. A plurality of ribbed segments 38, between the snap-hooks 36 are used to facilitate engagement of the hinge elements with the snap-hooks 36 when assembling the container, and to keep the sidewalls 14, 16 in place. The ribbed segments 38 have a curved or slanted upper surface to guide the hinge elements on the side walls into the snap-hooks 36 during assembly as described below, and hold them in place. The snap-hooks 36 and hinge elements eliminate the need for a separate hinge pin typically utilized in such containers. The elimination of the hinge pin lowers the cost of assembly by reducing the number of parts in the container and the number of steps required to assemble the container. Additionally, the absence of the separate hinge pins reduces the likelihood of damage to the container in this area (i.e., the hinge pin is one component that is easily damaged and requires repair).

The snap-hooks 36 are shown extending upward from the upper surface 24 of the base portion 12, with the generally C-shaped (from a side perspective) hook portion curved toward the projections 26 extending along the edge of the sides of the base portion 12. Positioning the snap-hook 36 in this manner avoids problems associated from hinge elements that extend from the side of the container (e.g., from the projection 26). Such side mounted hinge elements tend to fail if the side wall or base projection bows outwardly. This tends to happen in some containers after a period of use.

Each end 32, 34 of the base portion 12 includes interlock tabs 40 and a central locking tab 42, which cooperate with structure on the lower portion of the end walls 18, 20 to hold the end walls 18, 20 in place when the container is set up in an unfolded configuration.

The central tab 42 is provided with a window 44 which extends through an upper surface of the tab. The window 44 allows for easy visual inspection of the container to ensure the end walls 18, 20 are properly positioned and snapped into place. When the end wall is properly situated in an upright position, a snap tab or other structure in the end wall cooperating with the central tab 42 will be visible through the window 44. This feature can be facilitated by making the end walls 18, 20 a different color or design than the base portion 12 of the container 10 (or at least by making the bottom of the end walls or snaps, and the central tab different colors or designs).

The upper surface 24 of the base portion 12 also includes a plurality of inclined projections 46 positioned proximate each end 32, 34 of the base portion 12. The inclined projections 46 each include an inclined surface 48 (formed as three ribs each having an inclined or slanted top surface) which extend upward from the surface 24 toward the respective ends 32, 34. A flat or horizontal surface 50 extends from the top of the inclined surface 48 toward a respective end of the bottom. The inclined surface 48 allows the bottom portion of the end walls 18, 20 to cam over the projections and lock in place in the assembled configuration.

Referring to FIG. 3, the bottom of the base portion 12 includes a plurality of feet 52. Each foot 52 is provided with a plurality of cross-ribs 54.

The sidewalls 14, 16 of the container 10 are snap-fittingly connected to the base portion 12, as well as to the rim portion 22, to form a hinged connection at the base and rim respectively. The sidewalls 14, 16 are configured to collapse inwardly toward the interior of the container 10 in a folded configuration. To accomplish this, each of the sidewalls 14, 16 comprises two components, a lower sidewall portion 56 and an upper sidewall portion 58 hingedly connected to the lower sidewall portion 56.

FIGS. 5 and 6 provide perspective views of the interior side and the exterior side, respectively; of the lower sidewall portion 56 (the terms “interior” and “exterior” are made with reference to the container in an assembled, unfolded configuration as shown in FIG. 1). At a lower end, the lower sidewall portion 56 includes a plurality of integrally formed hinge elements comprising hinge axels 60 spanning from a first wall to a second wall of rectangular shaped gaps 62. The hinge axels 60 are positioned to match up with the snap-hooks 36 arranged along the sides of the base portion 12. The gaps 62 are sized to allow the C-shaped ends of the snap-hooks 36 to pass between the hinge axels 60 and the rest of the lower sidewall portion to engage the axels 60 and hingedly connect the lower sidewall portion 56 to the base portion 12.

Each end of the lower sidewall portion 56 is provided with a notch 64 extending from the interior side of the sidewall portion 56. The notch 64 is positioned and sized to cooperate with the interlock tab 40 on the base portion 12 when the sidewalls 14, 16 are collapsed or folded down into the base portion 12 of the container. The interlock tab 40 fits in the notch 64 and prevents the lower sidewall portion 56 from moving. This prevents the lower and upper (which is connected to the lower sidewall portion as described herein) sidewall portions 56, 58 from moving laterally and increases the stability of the container in the collapsed configuration. In the design shown in the Figures, the lower sidewall portion 56 is sized so that it will not contact the central tab 42 on the base portion 12. However, another notch can be provided (at the top of the lower sidewall portion) if a larger sidewall is desired. Moreover, the lower sidewall portion 56 can include additional notches to match additional tabs or other structures extending upward from the base portion 12 (i.e., additional tabs or structures can be added to the base portion depending on size and stability requirements of the container).

The top of the lower sidewall portion 56 includes a plurality of integrally formed snap-hooks 66 configured to cooperate with hinge axels or pins 68 integrally formed on the bottom of the upper sidewall portion 58. The combination of the snap-hooks 66 and the hinge axels 68 provides a hinged connection between the lower sidewall portion 56 and the upper sidewall portion 58. The snap-hooks 66 and hinge axels 68 are configured to allow the lower sidewall portion 56 and the upper sidewall portion 58 to rotate with respect to each other so that the entire sidewall 14 or 16 collapses or folds about the hinged connection into the interior of the container. The lower sidewall portion 56 also rotates about the hinged connection to the base portion 12 so that the interior surface of the lower sidewall portion 56 lays flat on the upper surface of the base portion 12. In the collapsed state, the exterior surface of the upper sidewall portion 58 lays flat on top of the exterior surface of the lower sidewall portion 56.

The top of the lower sidewall portion 56 also includes an integrally formed, centrally located blade 70. The blade 70 extends upward and is configured to fit into an integrally formed pocket 72 centrally located on the bottom of the upper sidewall portion 58. The pocket 72 has a generally rectangular lower surface 74 which contacts an upper surface 76 of the lower sidewall portion 56 surrounding a lower portion of the blade 70. The rectangular surface 74 acts as a landing for distributing compressive forces on the container 10 (e.g., from other containers stacked on top of the present container). Similarly, the upper surface 78 of the blade 70 contacts an interior upper surface (not shown) of the pocket 72 to further facilitate distribution of compressive forces.

The blade 70 and pocket 72 work with aligned column supports 80, 82 on the lower sidewall portion 56 and upper sidewall portion 58, respectively, to create a centrally located load area for the container 10. The column supports 80, 82, each include a plurality of support ribs 84, 86 extending toward the interior of the container 10.

The blade 70 and pocket 72 also work together to make sure the lower and upper sidewall portions 56, 58 are aligned when the container 10 is in an assembled or unfolded configuration. The blade 70 and pocket 72 also strengthen the sidewalls 14, 16 from internal or external lateral forces applied to the sidewalls 14, 16 of the container 10.

On either side of the blade 70, the lower sidewall portion 56 includes a first and second pocket 88 designed to cooperate with a corresponding first and second L-shaped (in cross-section) hook 90 (as illustrated in FIG. 7) on the upper sidewall portion 58. The L-shaped hook 90 includes a generally planar wall 91 section extending downward from the upper side wall portion 58, and a horizontal ledge 93 extending from the end of the planar wall 91. The pockets 88 are open to the interior of the container 10 when assembled. Each pocket 88 includes a horizontal wall or shelf 92 at the top of the pocket 88 extending from a vertical wall 94 of the pocket 88. The pockets 88 are each positioned between two of the snap-hooks 66 on the lower sidewall portion 56.

Similar to the pockets 88, the L-shaped hooks 90 are positioned between two of the hinge axels 68 on the upper sidewall portion 58 and are aligned with the pockets 88 when assembled. Each L-shaped hook 90 includes a horizontal wall or shelf 96 extending from a bottom of a vertical wall 98. The wall 96 of the L-shaped hook 90 projects outward from the vertical wall 98 away from the interior of the container 10. A plurality of support ribs 100 extend along an interior side of the L-shaped hook 90 as shown in FIG. 8.




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stats Patent Info
Application #
US 20110056935 A1
Publish Date
03/10/2011
Document #
12939554
File Date
11/04/2010
USPTO Class
220/6
Other USPTO Classes
International Class
65D8/14
Drawings
17


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